|
Letter 38049
Etching titanium with oxide layer
+++++
I want to ask if anybody knows what etchants can I use for etching
titanium after thermal oxidation. I want to see the titanium
microstructure and the oxide coating. Now I am using 2% HF+2%
HNO3+96% H2O and oxide coatings are etched off or the microstructure
is not visible in order how long I am etching samples. Can anyone
help me?
Krzysztof Mendzik
Czestochowa University of Technology - Czestochowa, Silesia,
Poland
+++++
I suggest you to try straight %2HF. don't exceed 25 seconds. start
etching from 10 seconds and find the optimal time by increasing the
time you are etching for a second interval for every try.
Fatih Akdas
ist. tech. uni. - Istanbul, Turkey
+++++
To get a look at the oxide layer, you probably are going to have
to plate it with something like copper with little activation or
cleaning. This will be rather non adherent, but it will be enough to
protect the oxide layer. Dilute your etch by half and swab it on for
a couple of seconds at a time. Rinse very well so the vapors do not
attack your microscope. Repeat etch as many times as required. When
you have your photomicrograph of the oxide, etch the Ti in the full
strength as long as is required.
James Watts
- Navarre, Florida
Dear Reader, please --
- Answer or follow-up on this subject (in non-commercial
fashion).
-
- My company is a supporting advertiser at
finishing.com and we want the contact information to reach
the inquirer privately.
-
- Post a new
question or inquiry on a different subject.
-
 |